Microwave spectroscopy is a kind of technique with high sensitivity and resolution for studying molecular dynamics and hyperfine structure of molecules, and could be applied in the areas of chemistry and physics. Some chemical and physical problems, which were difficult to unravel by other techniques, could be solved successfully by microwave spectroscopy. The researches of internal dynamics of complexes between water and organic/biologic molecules by microwave spectroscopy are reviewed in this paper. The forming of complex, structure, conformation, and internal dynamics of the complexes between water and organic chain molecules, aromatic ring molecules, organic compounds containing halogen and biomolecules are discussed in details. The dynamics of the proton donor or proton acceptor of water, typology of interaction, tunneling motions of the complex and conformation changes are introduced. It is illustrated that the internal motions of the partner molecule of water in the complex influences the tunneling features. Tunneling motions of water and organic molecules in the complex are related to the bond strength of the interaction and the symmetry involved in the water and partner molecules. Future trends of microwave spectroscopy are prospected. Contents
1 Introduction
2 Internal dynamics in complexes of water with organic molecules
2.1 Typology of interaction
2.2 Internal dynamics features in complexes of water with organic molecules
3 The complexes of water with CFCs compounds
3.1 The O-H…X hydrogen bond
3.2 The halogen bond
4 The complexes of water with organic chain compounds
5 The complexes of water with ring organic molecule
5.1 Water as proton donor
5.2 Water as proton acceptor
5.3 Water as proton donor and acceptor
6 The complexes of water with biomolecule
7 Conclusion and outlook